Month: May 2019

Fat suppression techniques

Fat suppression techniques take of two (2) characteristics. First, the difference in precession frequency between water and fat, which is utilized in chemical/spectral (pre)saturation, Dixon/IDEAL and water excitation techniques. Second, the difference in T1 relaxation times between water and fat, which is utilized by STIR sequence. Finally, there are hybrid techniques, which combine the two …

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High resolution MR Imaging of the knee on a patient with radial meniscal tears

High resolution MR Imaging of the knee on a patient with radial meniscal tears

High resolution MR Imaging of the knee on a patient with radial tear of the pars intermedia/posterior horn of the medial meniscus. The MRI protocol was based on orthogonal (axial, coronal, sagittal) PD-w FS, coronal T1-w and sagittal PD-w acquisitions. Radial meniscal tears are the most common type of meniscus tear. They run perpendicular to …

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Gadoxetate Disodium–Enhanced MRI of the Liver on a patient with hemangioma

Gadoxetate Disodium–Enhanced MRI of the Liver on a patient with hemangioma

Gadoxetate Disodium–Enhanced MRI of the Liver on a patient with hemangioma. Hemangiomas normally have a typical presentation at MRI with extracellular contrast and are not an indication for investigation with hepatobiliary contrast (Gadoxetate Disodium). At conventional MRI, hemangiomas present marked hypersignal on T2-weighted, hyposignal on T1-weighted sequences, discontinuous, nodular, peripheral contrast enhancement in the arterial …

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Multiparametric (anatomical & functional) MR Imaging of the facial skull and neck

Multiparametric (anatomical & functional) MR Imaging of the facial skull and neck on a patient with squamous cell carcinoma. Facial and neck are very heterogeneous regions, containing a variety of tissues that include fat, muscle, air, glandular tissue and bone. For this reason, chemical/spectral saturation and hybrid fat saturation techniques (SPAIR, SPIR, SPECIAL) suffer from …

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